By an analysis of the backfill tamping problems in drainage pipelines, and after many years of practice, the author has found corresponding measures with good results.
通过对排水管道回填土夯实存在问题的分析，经过近几年的实践找到了相应的措施和对策，并收到了良好的效果。
Experimental researches on the reuse of filter backwashing water are carried through by giving a thorough analysis to the drainage technology in Xinkaihe Waterworks.
通过对新开河水厂排水工艺的深入分析，进行了滤池反冲洗水回用的试验研究。
Some key technical problems have been amended, for example, leakage of hydraulic pressure bursa, control of drainage, analysis of apparatus system error, design of accessorial equipments, and so on.
解决了该仪器系统存在的几个关键技术问题，如液压囊漏水问题、排水控制问题、仪器系统误差分析、附属设备的设计等。
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